Luk 3:10 And the crowds were responding to him, and this is what they said, “What then should we do?”
Luk 3:11 And he responded to them, and this is what he said, “The one who has two tunics must share with the one who does not have any, and the one who has food must do likewise.”
Luk 3:12 And tax collectors also came to be baptized, and they said to him, “Teacher, what should we do?”
Luk 3:13 And he said to them, “Collect no more than “what is required of you.”
Luk 3:14 And those who served in the army were also asking him, saying, “What should we also do?” And he said to them, “Extort from no one, and do not blackmail anyone, and be content with your pay.”

proving our repentance

John’s audience understood that repentance means more than just saying “yes” to God’s offer of forgiveness. It means removing the obstacle of sin that keeps God from restoring his creation to its intended perfection. We need to prove that our repentance is genuine. It takes more than just raising your hand, coming down an aisle, or even saying a “sinner’s prayer.” Both water baptism and righteous living are proofs of genuine repentance. Neither is the thing which saves; we are saved by grace based on the finished work of Christ on the cross. But the believer who is serious about proving his repentance will follow Jesus into the waters of baptism, and will evidence his faith by living faithfully.